Turbocharged internal combustion engine with resonance induction pipe system

ABSTRACT

The invention concerns a supercharged internal combustion multicylinder engine, an exhaust-turbo supercharger driven by exhaust gases from the cylinders which are divided into groups so that the suction strokes of the cylinders within a given group do not overlap, and a resonance induction pipe system connecting the inlet means in each cylinder to the delivery side of the supercharger so as to create conditions of dynamic charging in the induction pipe system to supplement the action of the supercharger.



1. A supercharged internal combustion engine comprising a plurality of working chambers having at least one group of at least one working chamber and at most four working chambers per group, at least one exhaust-turbo super-charger connected to receive and be driven in use by the exhaust gases from said working chambers, means for controlling the operating sequence of the said chambers to time the suction strokes to the said chambers within a multichamber group to take place without substantical overlap, inlet means in each said chamber, and a resonance induction pipe system connecting the said inlet means to the delivery side of said supercharger, said pipe system comprising a receiver between said supercharger and said inlet means, a resonance vessel between said receiver and said inlet means, and a resonance pipe between said vessel and said receiver.
 2. An engine as claimed in claim 1, and a pipe between said inlet means and said vessel, said pipe having a length in meters no greater than 1,500 divided by the rated r.p.m. of the engine.
 3. An engine as claimed in claim 2, the capacity of said vessel being greater than one-half but less than 10 times the capacity of a said working chamber and the length of said resonance pipe being greater than 8 times the diameter of a circle having the same cross sectional area as the interior of said resonance pipe between said vessel and said receiver.
 4. An engine as claimed in claim 1, said groups being at least two in number, there being a said vessel individual to each said group, said receiver being common to all said groups. 